Oil heating system for locomotive boilers



June 3, 1924.

1 ,496,521 J. J. CAIN OIL HEATING SYSTEM FOR LOCOMOTIVE BOILERS FiledSept. 9, 1922 2 Sheets-Sheet I awumtoz J. J. cAlN OIL HEATING SYSTEM FORLOCOMOTIVE BOILERS June 3 Filed Se t. 9, 1922 2 Sheets-Sheet Z PatentedJune 3, 1924.

UNITED STATES JOHN J. CAIN, OF BAYONNE, NEW JERSEY.

OIL HEATING SYSTEM FOR- LOOOMOTIVE BOILERS.

Application filed September 9, 1922. Serial No. 587,249.

To all whom it may concern:

Be it known that I, J on: J. CAIN, a citizen of the United States, and aresident of Bayonne, county of Hudson, State of New Jersey, haveinvented new and useful Improvements in Oil Heatin Systems forLocomotive Boilers, of whic the following is a specification.

The oil burner of this invention is designed to heat boilers ofconsiderable length, such as locomotive boilers which are nowconstructed with the fire at one end only. Under the existing method ofoperating boilers the fire at one end of the boiler has to be maintainedat a very high temperature to produce effective heating at' the otherparts as the products of combustion pass and act on the heatin surfacesthe full length of the boiler, Whic naturally results in unequalheating, of considerable variance, of the different parts of the boiler.The damaging eifects of the very high temperature maintained in thefurnace is also a matter of considerable importance.

To correct this deleterious feature in heating long boilers thisinvention provides auxiliary furnaces located under the boiler,

ahead of the rear end furnace, at parts that are acted upon by thereduced heat of the partly spent gasesthereof; the heat of the auxiliaryfurnaces acts with and augments the reduced heat of the products ofcombustion from the end furnace and so causes all parts of the boiler tobe uniformly heated.

The type of boilers to which my present improvements in oil burners isparticularly applicable is shown in my U. S. Letters Patout No.1,l63,250, issued July 31, 1923, in which the water holding and heatingelements consist of narrow hollow sections transversely arranged and ofa size to substantially occupy the whole of the transverse area of theavailable space for the boiler above the running gear of'the locomotive,and walls or baflles, alternately arranged. extending from the bottom ofthe boiler to the under ed e of a section and extending downward y fromthetop of the boiler to the upper ed e of another section, there ylongitudinal y dividing the boiler into sections or divisions throughwhich the products of combustion are alternately directed upwardly and.downwardly from the furnace at one end of the boiler to the exit openingat its other end.

The invention contemplates the employment of an auxiliary or secondaryfurnace,

as an oil burner when oil is used as the heating means of the boiler, ata longitudinal division ahead of the main furnace to augment the heatapplied to the sections of the forward divisions, thereby greatlyincreasing the steaming qualities of the boiler; in other words theinvention may be consid ercd as a heat equalizer, whereby an uniformityof heat will be applied o all of the sections of the boiler, thusavoiding strains from unequal heating; it being also understood that byreason of this heat equalizing system the end or main fire may be soreduced in intensity as to avoid dama e due to excessive heating of thecrown s eet-s and side walls of the furnaces of ordinary boilers or ofthe transverse sections in or constituting the main fire chamber of thisboiler.

In applying this heat equalizing method to locomotive boilers a chamberor chambers, the equivalent of a fire box or fire boxes, will be formedat the part or parts selected to receive the additional heat, in whichthe auxiliary oil burners will be located, and said fire boxes will beprovided with openings and dampers adapted to be closed when theauxiliary furnaces are out of action; the arrangement being such thatthe burners and their accompanying air dampers may be controlled fromthe cab or firing end of the boiler, thus enabling the engineer to runthe boiler on the main fire only, when such provides the necessary heat,or to put into action the auxiliar fire or fires as the steamingrequirements emand. a

In the accompanying drawings an embodi ment of devicessuitable for thepurposes of this invention are illustrated, in which:

Fig. 1, is alongitudinal section of a locomotive boiler provided withthe improved heating means of this invention.

Fig. 2, is a transeverse section of the main fire box of the boiler,taken on the line 2, 2, Fig. 1, and

Fig. 3, is an enlarged view of an auxiliary burner and its air damper.

The narrow hollow sections 4,4, of the boiler, the steam equalizingdru n5, located at the central upper parts of the sections and connected bynipples thereto, are as shown in my before-mentioned patent. Other artsof the boiler, as the longitudinal mud c ambers 6, connected to thebottoms of the side legs of the sections 4;, the upper baflle wall 7,lower batfie wall 8, which divide the boiler up has outlet airs intohfiigitudinal sections er divisions, the main the box 9. smoke chamberll), the su erlleater sections 11, connected between the dry plpe 12 andthe steam pipe 13, and the cab 14. are in all essential respects similarto the corresponding parts of my appliestion Xe. Z 6 $3-l8, tiled June'3, 1922.

The main oil. burner 15, which may be of any suitable kind. as forinstance a steam spray burner. is located at. the rear end of the boilerto direct its flame through the fire box 9 towards the furnace bat'kwall 16. The products of combustion after ascending around the first setof sections 4, pass downwardly around the s'eeond set, being directedthereto by the up er battle Wall 7, thence upwardl-y through the thirdset of sections, di rented by the lower bafile wi'all 8 and finallydownwardly through the lastset of seet'i'ons a the opening of the snakeeliamber 10.

The inversion is set necessarily limited to seetienal boilers ae sheen,Iidl" to the number of 1113 and d iait (ii-shines shown, vivhieh iiivery long bGilei-s he iiiereas'ed to an desiredor adequate extent nei inRin boilers the 9511 in temperature 05E; the furnace gases from thefiring end to the efit end is considerable and to raise effective steathroughout the boiler, by the end the only, intense heat must bemaintained at the furnaee end, often of a damaging character to thispart of the lieiler.

Now the metliod oi heating boilers involved in this intention avoids thenecessity of intensely heating the furnace end; it produces the maximumquantity of steam at maximum pressure Within the captaeity and stren thof the esse- Without dasgeeeasl heat-ii ea thereof. This is aeolnp'lisheby the use of an auxiliary till bhrnr 17 arranged to dileet its name;into a life box 18,- loeated beneath the third division 01 thetransverse set ions 4, said fire box having an ofining' pioi ideil witha closing door or damper 19.

It is tident that ordinarily the hot gases froilithe ehd furfiaee 9 fillhave sues eonsiderabljf in tempeismee by the time they enter the forwardfire 15bit 1?, w{;e1 e they eoiuniingle with the Hot gases 6f t eb'u'lner in said fire box: the ter'l'i "ema ls of the mined gases thenheatiiiig the leeward part of the boiler substantial y equal to theheating effects at the rear end of the llliilei of the fuel eoiilbustionin the eiid' flifha'ee 9. This result is assisted or expedited by thereareing efi'egts of the eons triietion of the if? "e oftensshe'ivmwhich difidfes sea a; the

sea 17; h m a niifiiliif of senseii {drilled by the see n a gift of pabtiibr i fi m $8 s 1116b friifd gfis stqbeuni 13 as smegma ears arerocking in a bracket bearing. and having on its inner end an armconnected by a link 21 to the stem of the valve 17. and by link 22 tothe damper door 19. The other end of the shaft 20, located beneath theside of the boiler. has an arm 23, to which is attached a rod 24,extending rarivardly to the cab and there connected to an operatinglever 25. The outer end of the shaft is held in a bearing 26. H 7

By this arrangement the damper may be set to regulate the aii supplielto the bur-n51 and be closed when the Writer is shut 0 5'.

It may in some eases be desirable to employ hnother burner 27 t6 su'pplyadditional fire in the fire box 9; this burner Enid: its air supply maybe controlled means similar to that a filied to the burner 17; ddmpfillga eontro' ling Handlever 28; in the Gab; at 1'66. 29 connecting thislever to an ass 30 as? the snsfi 31, having a bearing in a bf'aeket, alink connection 32' the arin 36 and the steih 83 of the burner valveanti a link 34 connecting the arlll' to the damlper d661- 35 of the airop'enin 36 and 37 designa e pilot burners for the oil burners 17 ahd 27respetively. V

The transverse seetitins ii are here shown as having plain flat sides;the ermgated seasons of my befojtb inentioned application may be used inthis base.

I Claim 1. An o'il heating eiiparatus for 16mmtiv boilers, eomprisiu V amain oil burner in a tire hex at the fear ll of the boiier transversebaifie Walls dividin the boiler into alternate up and down draft anauxiliary fire box at the lower end of arid oening into up draft mesasheet! ef the end fire boX mid oil bui ning fnttns in ala auxiliary thebox. whereby high temperature gases of combustion (if the sexiliar'yburner mix with th epiir'tly heat sjint gases from the burner at therear end of the boiler and thereby insures in all pai'tlsjo'f the boilerbrac'ticallj uniform steering I' e' suits.

2. An oil heating separates fdr locomotive boilers, a inaih oil biirnifiin a firebnx at the of the Ioeom'otwe, a separate inde endent (fen tssex 1htermediafe the fiie 6i: and the smoke exit ante other an; of ditisher me an oi beer hi id fit et tf fi e titer Whi'ehfhe ffa hifat asesse res ss s. 1 es the a xiliar b e' wees efjboil'er tljjoii gliiitt itslength is sessitially uniformly at U 7 .7 new f t eea s w having aheating ffieafi at one of i ates,

the gaseous products of combustion acting on the boiler throughout itslength to its other end, or forward part which consists in applying theinitial heat of a burning fuel to the boiler intermediate its ends tocommingle with the partly heat spent gases from the end fire and withthem act on the for- Ward part of the boiler.

4. A locomotive boiler, comprising narrow hollow sections transverselyarranged and spaced apart to afford vertical heating passages betweenthem, combustion spaces at the under edges of the sections and a passagealong the tops of the sections into which all of the vertical passagesopen, a fire box and heating means therein at the rear end of theboiler, a baflie wall closing the combustion space at the under edge ofa section at the front end of the rear end lire box, a bafile Wallathwart the top passage and resting on the top of another section inadvance of the said lower bafile Wall, an independent fire box locatedunder and opening into a division of the sections ahead of the upperbaffle Wall, an auxiliary burner in said independent fire box, a bafflewall closing the combustion space at the under edge of a section at thefront end of the forward'fire box and a flue exit from the combustionspaces of the last division of sections ahead of the last mentionedbafile wall.

Signed at New York, county and State of New York, this 6th day ofSeptember, 1922.

JOHN J. CAIN.

